Singularity Gear Squad by Green Juice Team (Valdir Do Nascimento Salgueiro, Paulo Henrique). Defeat hordes of biomechanical aliens in this shmup game.
The CREATE Game Jam, sponsored by Kill Screen and OUYA, is an online contest challenging developers to make playable prototypes in just 10 days. Many world-class games were initially conceived in game jams. Don't have an OUYA? Pre-order one here.